As soon as electricity starts running through a wire (conductor), a magnetic field is created around that wire. If a compass was put beside the wire with current going through it, the compass would be affected which proves that there is a magnetic field around the wire.
What's even more amazing is that the world's magnet isn't actually pointing directly north or south, but rather some degrees off. There is no current explanation of why.. perhaps 2012? :(
But wait, there's something else. Scientists don't have time to draw all these fancy diagrams therefore they use symbols like the 'o' and 'x'. The 'o' symbol represents a wire going towards you, as the 'x' represents it going away. Just think of an arrow as an example and you'll get it. :]
Now, to help us out with the circuits and what not, we use the right hand rules! There are 3 in total, but I'm only going to briefly talk about 2 of them.
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